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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @summary Stress test async UL in dropping and stalling mode
 * @requires vm.flagless
 * @requires vm.debug
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 * @run driver/timeout=480 StressAsyncUL
 */

import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

public class StressAsyncUL {
    static void analyze_output(boolean stalling_mode, String... args) throws Exception {
        ProcessBuilder pb =
            ProcessTools.createLimitedTestJavaProcessBuilder(args);
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldHaveExitValue(0);
        if (stalling_mode) {
            output.shouldNotContain("messages dropped due to async logging");
        }
    }
    public static void main(String[] args) throws Exception {
        analyze_output(false, "-Xlog:async:drop", "-Xlog:all=debug", InnerClass.class.getName());
        analyze_output(true, "-Xlog:async:stall", "-Xlog:all=debug", InnerClass.class.getName());
        // Stress test with a very small buffer. Note: Any valid buffer size must be able to hold a flush token.
        // Therefore the size of the buffer cannot be zero.
        analyze_output(false, "-Xlog:async:drop", "-Xlog:all=debug", "-XX:AsyncLogBufferSize=192", InnerClass.class.getName());
        analyze_output(true, "-Xlog:async:stall", "-Xlog:all=debug", "-XX:AsyncLogBufferSize=192", InnerClass.class.getName());
    }

    public static class InnerClass {
        public static void main(String[] args) {
        }
    }
}
